Abstract
New methods have been developed for preparing columns in open-tubular micro-capillary liquid chromatography. Layers of aluminium oxide powder were formed on the inner walls of capillary tubing, and then the tubing was drawn into a micro-capillary column. Alternatively, alumina or silica (particle diameter 10–40 nm) was dispersed on the walls of a micro-capillary and used as solid adsorbent or support material for further treatment with octadecylsilane, respectively.
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